Fixes #3914 - Use Initial Promises instead of Techniques (which contains unexpended StringTemplate variables) for install Rsyslog configuration
Refs #3914 - Expand CFEngine variables of rsyslog configuration to default values
Refs #3914 - Fix typo into localclean and add modification by sed for PostgreSQL password into rudder.conf
Merge pull request #120 from nperron/bug_3914/int/use_initial_promises_instead_of_technique_for_rsyslog

Fixes #3914 - Use Initial Promises instead of Techniques (which contains unexpended StringTemplate variables) for install Rsyslog configuration